Steam-pump



No Model.) 2 Sheets-Sheet 1.

T. J. OWENS.

STEAM PUMP.

No. 580,161. Patented Apr. 6, 1897.

IpJcgior (No Model.) 2 SheetsSheet 2 T. J. OWENS.

STEAM PUMP.

No. 580,161. Patented Apr, 6, 1897.

UNITED STATES- PATENT OFFICE.

THOMAS J. OWENS, OF BEDFORD, INDIANA.

STEAM-PUMP.

SPECIFICATION forming part of Letters Patent No. 580,161, dated April 6,1897.

Application filed August 26, 1896. Serial No. 604,010. (No model.)

To all whom, it may concern.-

Be it known that I, THOMAS J. OWENS, a citizen of the United States,residing at Bedford, in the county of Lawrence and State of Indiana,have invented a new and useful Steam Pump, of which the following is aspecification.

My invention relates to steam-pumps, and particularly to hot-waterfeeders for boilers; and the objects in view are to provide means foractuating suction-valves to avoid the resistance of the passage of waterto the boiler, to provide means for preventing expansion of the valvefrom causing inoperativeness thereof, whereby water at any temperaturemay be pumped without detracting from the efficiency of the apparatus,and, furthermore, to provide such a construction and arrangement ofparts as to avoid delay in admitting water to the water-cylinder,whereby the space in rear of the piston is fully occupied by water.Hence jaror hammer due to a partial vacuum when the direction ofmovement of the piston is reversed is avoided.

Further objects and advantages of this invention will appear in thefollowing description, and the novel features thereof will beparticularly pointed out in the appended claim.

In the drawings, Figure 1 is a side view, partly in section, of a pumpconstructed in accordance with my invention, the suction and steam valvechests being shown in section. Fig. 2 is apartial section of thewatercylinder, showing the discharge-valves. Fig. 3 is a partial sectionof the water-cylinder, showing the suction-valves.

Similar numerals of reference indicate corresponding parts in all thefigures of the drawlngs. 4

1 designates a steam-cylinder, in which is arranged a piston 2,connected to a pistonrod 3, and 4 represents a water-cylinder inclosinga pump-piston 5, which is connected to said piston-rod to receive motionfrom the piston operating in the steam-cylinder. In

connection with the water-cylinder is arranged a delivery-chamber 6,communicating with an outlet-pipe 7, and connected with thedelivery-chamber is a compressor or air-chamher 8. Communication isestablished between the water-cylinder and the delivery-chamber by meansof ports 9 and 10, controlled by delivery check-valves 11, and saidvalves are mounted in suitable guides 12 and are normally held seated bymeans of springs 13.

In connection with the water-cylinder I employ a feed-chamber 14, havinga supplypipe 15 in communication therewith. Spaced valve-seats 16 arearranged within the casing The inlet of steam to the steam-cylinder iscontrolled by a main slide-valve 27, operating in connection with avalve-seat 28 and controlling inlet-ports 29 and 30 and an exhaustport31, a steam-inlet pipe 32 being arranged in communication with apiston-valve casing 33, and this main slide-valve is operated by meansof an actuating piston-valve 34,mounted in said casing 33 and providedat its center with a seat to receive a projection 35 on the mainslide-valve. This actuating-piston is controlled by pressure admitted atthe extremities of the casing 33 through ports in the auxiliaryvalve-seat 36, and said ports are controlled by means of an auxiliaryslidevalve 37, having a stem 38.

Carried by the piston-rod 3 is a reverser 39, consisting of a blockprovided with a bifurcated head 40, through which extends thesuction-valve stem 24, and said valve-stem is provided at intervals withadjustable stopcollars or tappets 41 and contiguous cushions 42, wherebyas the reverser is moved in opposite directions by the reciprocation ofthe piston-rod it is brought into contact alternately with the cushionscontiguous to the respective tappets to move the valve-stem 24alternately in opposite directions. The suction-valves 23 are oppositelyopening, and hence the alternate movement of their stems in oppositedirections causes the simultaneous seating of one valve and unseating ofthe other, while the same are alternately opened to allow water to bedrawn alternately from the intermediate or feed chamber of thesuction-valve casing through the the ports and 21 into opposite ends ofthe water-cylinder. The valves 23 are held in the desired relativepositions by means of lock-nuts 43, whereby the proper seating thereofis assured. The auxiliary valve-stem 38 is provide 1 with spaced tappets44, between which operates a head on the short arm 46 of arocker 47,said rocker having its long arm bifurcated or slotted, as at 4:8, toengage a wrist-pin 49, carried by the piston-rod 3.

In Fig. l the piston is shown as having completed its stroke toward theright, but just prior to reaching the limit of its stroke in thisdirection the reverser comes in contact with the cushion contiguous tothe righthand tappet 41 and moves the valve-stem 24 to unseat theright-hand and seat the lefthand suction-valve, whereby when thesucceeding stroke begins the valves will have been set to admit waterthrough the port 20 and allow it to discharge through the port 9.

into the delivery-chamber and from thence through the outlet-pipe 7 intothe boiler.

From the above description it will be seen that my present inventionconsists of an improvement upon that shown and described in my formerapplication, Serial No. 584:, 80S,filed March 25, 1895, an importantdifierence residing in the fact that both suction-valves are carried bya single stem, which extends from a stufling-box in the end of thecasing, thereby avoiding complication of construction, within thecasing. The suction-valve seats are accessible for the purpose ofcleaning or otherwise through hand-holes 50, formed in the cap-plate ofthe casing.

Various changes in the form, proportion,

and the minor details of construction maybe 46 resorted to withoutdeparting from the spirit or sacrificing any of the advantages of thisinvention.

Having described my invention, what I claim isv The combination withcoaxial steam and water cylinders having pistons connected by a commonpiston-rod, suction-valves controlling the inlet-ports of theWater-cylinder and having a reciprocatory stem parallel with said 50piston-rod, and steam-valve mechanism for controlling the inlet-ports ofthe steam-cylinder, and including an auxiliary valve having areciprocatory stem also parallel with said piston-rod, of a reverser 39fixed to and carried by the piston-rod and arranged in up erativerelation with spaced cushioned tap pets on the suction-valve stem, and arocker having a fixed fulcrum, and provided with a short arm arranged inoperative relation with spaced tappets on the auxiliary valve-stem, anda long arm having a pin-and-slot con nection with the piston-rod,whereby approximately simultaneous reversal of the steam and suctionvalves is accomplished, the move-. ments of the suction-valve being morerapid in their reversal of position than is that of p, the steam-valve,to insure the complete and prompt opening of the former to feed thepump-cylinder with the minimum resistance, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto afiixedmy signature in the presence of two witnesses.

THOMAS J OWENS.

' Witnesses:

FERDINAND 0. (Ross, Jr MEs E. BONEFF.

